Safety paper stop gauge



May 11 1926. 1,584,447

'0. F. FRAUENBERGER SAFETY PAPER STOP GAUGE Filed April 17, 1925 .16 785 11M Qbto'wwq Patented May 11, 1926.

UNITED STATES ATENT GFFHQE.

CARL F. FRAUENBERG'ER, OF LONG ISLAND CITY, NEW YORK, ASSIGNOR TO S. H.ROSENBERG, 0F BROOKLYN, NEW YORK.

SAFETY PAPER .SIOP GAUGE.

Application filed April 17, 1925.

This invention relates to improvements in safety paper stop gauges forplaten printmg presses, cutters, creasers and like machines.

The object of the invention is to provide safety paper stop gauges ofsimple, practical and novel construction particularly well adapted foruse with heavy platen presses to be automatically operated or actuatedby the press itself.

Another object of the invention is to so construct and arrange thesafety paper stop gauges that they may be easily and quickly attached tothe machine without requiring any material alteration thereof.

With the foregoing objects in View my invention is disclosed in thefollowing specification and illustrated in the accompanying drawing inwhich- Figure 1 is a partial side view of a press equipped with myimproved gauges.

Figure 2 is an enlarged detail view of one of the gages with partsbroken away.

Figure 3 is a sectional view on line 33 of Figure 1 with parts brokenaway.

Referring to Figure 1 the press illustrated is of well known typecomprising in general a suitable framework or support 5 having a fixedbed 6 and a platen 7. The latter is operated from the press byconnecting rods as 8 (only one is shown) to rock or oscillate on a track9 in a well known manner. The numeral 10 denotes the chase and 11denotes the usual steel facing sheet on the platen.

In operation the paper, indicated at 12 in Figure 3, is fed against theusual gauges or stops 13. But because of the high speed at which themachine must be operated in order to be commercially profitable, thereis danger of the sheet being fed to the platen so rapidly and hurriedlythat the sheet will override the stops 13 and not register.

It is therefore necessary to provide means for momentarily arresting themovement of the sheet before it reaches the stop 13 so that it 'maygradually slide into position.

Such means consists in this instance of suitable yielding stop fingers14 adjustably pivoted or secured at 15, 15 to gauge arms 16, 16. Thereis a stop finger at each side of the platen and as they are alike, thedescription of one of them will suflice for this disclosure.

The gauge arm 16 is secured to a short shaft Serial No. 23,788.

17 which is rotatably mounted in a supporting bracket 18 adapted to fitover the edge or corner of the platen. The bracket is secured by meansof a bolt 19. The hole 20 for receiving the bolt is conveniently boredin longitudinal alinement with a screw 21 which secures the facing 11 tothe platen.

The shaft 17 carries a cam 22 and is surrounded by a spring 23 whichnormally tends to turn the shaft .so as to keep the gauge arm and stopfinger in the safety position shown in dotted lines in Figure 3. Thatis, the spring constitutes a means for maintaining the stop finger insheet receiving safety position, and also for automatically returningthe linger to such position after impression.

The cam 22 is shaped to cooperate with the portion 24 of the frame asshown in Figure 3.

The operation is as follows: When the platen is in sheet receivingposition, the

- safety stop fingers are in similar position as shown in dotted linesin Figure 3. When the sheet is fed to the platen, it slides down thereonand is met by the finger 14:, which, as the platen moves down toimpression position, gradually recedes and moves off the platen due tothe fact, that the cams 22 abut the frame at 24 and are gradually movedoutward.

The parts are so timed and arranged that the paper slides down againstthe stops 13 in proper registered osition before the press closes, atwhich time the safety stop fingers are moved entirely off the platen.lVhen the latter opens, the fingers are again moved into safety positionby the springs 23.

The stop' fingers are easily and quickly attached to the platen and donot interfere with the work of the press. They prevent overriding of thepaper over the stops 13 and insure that the sheet is in proper printingposition.

The connection at 15 between the stop ill) finger and the gauge arm maybe of any depaper stopping gauges carried. by said shafts, springs fornormally moving said gauges in over the platen to momentarily arrest themovement of a sheet thereon and cams secured to the said shai'ts forgradually moving said gauges off the. platen as the latter moves intoimpression position, said cams being actuatedby contact with a fixedportion 01" the press.

- In a platen press the combination with the platen, of paper stopdevices therefor comprising supporting brackets mounted on theplatempaper stopping gaugesrotatably mounted in said brackets, andextending in the path of the movement of a sheet of paper fed tosa'idplaten, movable means adapted to contact with a fixed portion ofsaid press for operating said gauges away from the platen as the lattermoves into impression position and means for automatically moving saidgauges back in overthc platen when the latter moves into sheet receivingposition.

3. Safety paper stop gauges of the character, described v comprising asupporting bracket, a shaft j'ournaled therein, a paper stop gaugemember mounted on one end of said shaft outside the bracket, anoperatingcam mounted outside said bracket on the other end of said shaft andadapted to rotate the latterin one direction, and a spring Within saidbracket for automatically rotating the shaft-in the opposite direction 7CARL F. FRAUENBERGER.

